Inkjet print head

H.M.A. Wijshoff (Inventor), P. Klein Meuleman (Inventor)

Research output: PatentPatent publication

57 Downloads (Pure)


In an inkjet print head an actuation chamber substantially extends in a first direction and the actuation chamber is associated with a piezo actuator arranged to generate a pressure wave in the actuation chamber. The pressure wave propagates in said first direction. A nozzle is associated with the actuation chamber such that a droplet may be expelled through the nozzle upon generation of the pressure wave in the actuation chamber. A reservoir is in fluid communication with the actuation chamber via an inlet and an outlet of the actuation chamber. A pump means is provided for pumping ink from the reservoir, via the inlet, through the actuation chamber, via the outlet back into said reservoir. The print head is provided with a means for reflecting the pressure wave at the outlet of the actuation chamber for enabling to generate a sufficient pressure at the nozzle for expelling the droplet.
Original languageEnglish
Patent numberWO2012041729
Publication statusPublished - 5 Apr 2012
Externally publishedYes


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